Democratic Senate candidate Chris Coons of Delaware will support extending all of the Bush-era tax cuts if elected and if doing so was his "only" choice, he said Thursday.

Coons or Republican Christine O’Donnell would be seated immediately after the Nov. 2 election and be put on the spot in Majority Leader Harry Reid's vote calculus for whatever package the Democrats put forward in the lame duck session.

"If that's what it takes to move forward, yes, if the only bill before you was for everyone,” Coons told CNN’s "American Morning," when asked whether he would vote in favor of the extensions with or without breaks to the wealthiest 2 percent of Americans.

"I would support extending the Bush income tax cuts, but I think we need to look hard at for how long and what cost. Any increase in income tax relief comes at the expense of other possible tax relief," Coons added.

In his nationally televised debate with O'Donnell on Wednesday night, Coons said he supports "extending the Bush tax cuts for the overwhelming majority of Americans," but questioned the "arbitrary" line of $250,000 of where the breaks should be ended.

Coons also said in the debate that Congress has a "tough choice" to make in deciding where that line should be drawn and for how long the cuts should be extended.